TMC Radio SRM9025 User manual

Page i

TNM-M-E-0001 Issue 3

SRM 9000 Series

FM VHF/UHF Mobile

Radio Transceiver

SERVICE MANUAL

TNM-M-E-0001

ISSUE 3

November 2004

f

Page ii

TNM-M-E-0001 Issue 3

SRM9000 Series FM VHF/UHF Mobile Radio Transceiver TNM-M-E-0001 ~ Iss 3

Page iii

TNM-M-E-0001 Issue 3

Declaration

The performance figures quoted are subject to normal manufacturing and service tolerances. The right is

reserved to alter the equipment described in this manual in the light of future technical development.

Copyright

prior permission of TMC Radio.

Errors and Omissions

The usefulness of this publication depends upon the accuracy and completeness of the information

contained within it. Whilst every endeavour has been made to eliminate any errors, some may still exist. It is

requested that any errors or omissions noted should be reported to:

TMC Radio Pty Ltd.

1270 Ferntree Gully Road

Scoresby Vic

3179 Australia

Ph: +61 3-9730-3800 (Direct: -3914)

Fax: +61 3-9730-3968

Mob: +61 408-160-661

e-mail: jkuhrt@tmcradio.com

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TNM-M-E-0001 Issue 3

Document History

Issue Date Comments

1 February 2002 Initial issue

2 August 2002 Re-branded to TMC Radio.

3 November 2004 Rev 9 information

List of Associated Publications

Document No. Description Issue

TNM-I-E-0005 SRM9000 Series Installation Instructions 5

TNM-U-E-0012 SRM9020 Trunk Operating Instructions 2

TNM-U-E-0013 SRM9020 PMR Operating Instructions 2

TNM-U-E-0014 SRM9025 PMR Operating Instructions 2

TNM-U-E-0015 SRM9025 Trunk Operating Instructions 2

TNM-U-E-0003 SRM9030 PMR Operating Instructions 2

TNM-U-E-0004 SRM9030 Trunk Operating Instructions 2

TNM-U-E-0020 SRM9030 Brief User Guide 2

TNM-U-E-0042 SRM9010 Brief User Guide 2

TNM-U-E-0043 SRM9020 Brief User Guide 2

TNM-U-E-0044 SRM9025 Brief User Guide 2

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TNM-M-E-0001 Issue 3

Warnings and Cautions

Caution

During disassembly and assembly, refer to Torque Settings in Section 1.7

Caution

Preparing the radio for alignment will erase from the radio all customer PMR and Trunking

configuration data (channel, signalling information etc). The only data retained by the Alignment

Tool is the factory alignment data for the radio (DAC settings for TX power, front-end tuning etc).

WARNING

SRM9000 radio equipment is to be connected only to 12-volt negative earth systems. In vehicles

with a 24-volt supply, an approved 24V/12V converter must be used. The supply must not be

taken from a 12V tap on the battery.

WARNING

To avoid RF injury, do not touch the Antenna when the Transmitter is in use.

WARNING

Double-fused 12V Supply Leads, Antenna cables and Speaker wiring is to be routed as far away

as possible from gas or fuel lines or any electronic control device. The radio transceiver and

antenna are to be mounted as far away as possible from these devices and their cabling.

Equipment is to be installed, by a competent person, in accordance with the requirements of local

radio communications authorities and/or Health and Safety regulations.

Post installation checks should be performed to ensure that there is no effect on the operation of

the vehicle’s electronics.

WARNING

Do not operate your radio, without a handsfree kit, whilst driving a vehicle.

WARNING

Do not operate your radio in an explosive atmosphere. Obey the “Turn Off Two-way Radios”

signs where these are posted, e.g. on a petrol station forecourt.

WARNING

Compliance with RF Energy Exposure Standards: To minimise exposure to RF fields during

equipment service and repair, the antenna terminal of the SRM9000 radio should be connected to

a suitable non-radiating RF load when the transmitter is in use.

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TNM-M-E-0001 Issue 3

GLOSSARY OF TERMS

A summary of common radio terms and some other terms used in this document, and their meanings, are

given below.

3RP Trunking Signalling Specification relating to trunked networks for shared use. Used

primarily for networks in France.

ADC Analogue to Digital Converter.

AFC Automatic Frequency Control.

AGC Automatic Gain Control.

Alarm A selcall sequence sent from a subscriber equipment to indicate an Emergency

situation.

When activated the radio will enter a repeating sequence consisting of an Alarm

Live Transmit Time and an Alarm Dead Receive Time.

Certain special conditions for the radio may also occur during the alarm - see

Conditions during Alarm.

A dedicated SFM (trunked system) that is sent by pressing the Alarm Key.

ANN Abbreviation for Algorithmic Network Numbering. This is the numbering system

where the numbers presented to the radio user can be mapped directly to the

MPT1327 PFIX/IDENTs and vice versa by use of a fixed algorithm in combination

with some other customisation parameters. See also FPP and MEP.

Auto Interrogate An Acknowledge identity sent as a response to an individual reset call.

Automatic Power Feature whereby the transmit power is automatically set to a level determined by

the level of the received signal. This is used to extend the battery life of a Portable.

Automatic Volume Feature whereby the background audio level is monitored and if this is found to be

noisy then the volume level is increased to compensate, allowing the user to hear

better.

Background Hunting The searching for an alternative and 'better' control channel whilst already on a

valid control channel.

BCAST MPT1327 broadcast message. Used to transmit information about the trunked

radio system to radio units.

Busy The state of a channel such that:

• For a non-signalling channel - if Busy this means that the carrier is above squelch.

• For a channel with CTCSS/DCS - if Busy this means a signal is being received with

either no CTCSS tone / DCS code or the correct CTCSS tone /DCS code.

• For a channel with Selcall - if Busy this means a closed channel where the signal is

above squelch.

A feature that equates to 'Do Not Disturb' such that the radio will reject all non-

emergency calls. This feature can be activated using the Busy key (if assigned) or

from a menu; it is reset to disabled at switch on.

C4FM Compatible 4-Level Frequency Modulation.

Call Back A request, sent by the dispatcher, to a unit requesting that the unit calls the

dispatcher back.

CCSC Control Channel System Codeword.

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TNM-M-E-0001 Issue 3

Channel Spacing The distance (in Hz) between the defined frequency channels.

CHEKKER System Interface Specification for Trunked Networks in Germany.

CLIM Call Limit Time; time limit on calls made. Normally this is defined by the Call Time

Limit parameter but can by overridden by the TSC depending upon the setting of

TSCLIM.

CLIME Emergency Call Limit Timer.

Clipboard A temporary storage area in Windows used to store data in cut, copy and paste

operations.

Closed A state where transmit and receive are not allowed until a Selcall message to open

the channel has been received. A Closed Channel is one which defaults (when

selected or after timed reset) to its closed state. Contrast with Open. Normally a

Closed channel would have Selcall Mute and PTT Inhibit would be enabled.

CODEC COde (Analogue to Digital Converter) / DECode (Digital to Analogue Converter).

Community Repeater A communications set-up whereby different groups of radios can operate by using

only one base station. This is achieved by the use of CTCSS tone signalling such

that each group has a different CTCSS tone (encode and decode) and radios can

only communicate with other radios in their group. Only one group of radios can

use the base station at any one time.

Continuous A continuous control channel is one that is only used by one site. There are no

breaks in the transmission of signalling. Emergency Call Time Limit

Control Channel A channel used for the transmission of messages that enables the TSC to control

radios. Control channels may either Continuous or Timed Shared.

Control Channel Burst A feature that enables control channel burst transmissions on systems using time-

shared control channels. It is unavailable if the control channel acquisition type is

not 'Time Shared'. To make available: go to Control Channel Acquisition Type and

set to Time-shared.

CTCSS CTCSS stands for Continuous Tone Controlled Signalling System. A continuous

tone (lower than the audio range of the receiver) is modulated onto the carrier as

well as other signalling or voice traffic. Compare with DCS. Only receivers which

have been instructed to recognise the same CTCSS tone are able to receive the

transmissions, since the squelch of receivers looking for different CTCSS tones

prevents the audio from being heard. This provides a simple method of sending

messages to selected receivers only and allows several different networks to use

the same frequencies. CTCSS is also known as Tone Lock or Tone Squelch.

DAC Digital to Analogue Converter.

Dash (-) digits Digits known as 'No Tone' digits used in Selcall Identities.

DCS Digital Coded Squelch system is based on sending a continuous stream of binary

codewords using, low deviation, direct frequency shift keying. Only receivers which

have been instructed to recognise the same DCS sequence are able to open their

squelch and receive the associated speech transmissions. This provides a simple

method of sending messages to selected receivers only and allows several

different networks to use the same frequencies.

Decode Reception of signalling. Either Selcall where encoded tone frequencies are

decoded and identified as specific tones digits or CTCSS/DCS where tones are

analysed to see if the channel should be opened.

Demanded Demanded Registration; a procedure in which the TSC forces a single radio unit to

attempt registration immediately (providing the radio is not already attempting to

register).

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TNM-M-E-0001 Issue 3

Disabled The 'False' state of a parameter. That indicates this parameter is not active.

Typically this state is represented by an unmarked check box. Compare with

Enabled.

DSP Digital Signal Processor.

DTMF Abbreviation of Dual Tone Multi-Frequency signalling. Used to dial into Telephone

networks using tone dialling.

Dual Watch A facility that enables the Radio to periodically monitor another channel for a signal

above squelch. Typically applications are checking an emergency channel whilst on

another channel.

Dynamic User Groups These groups use a temporary user Ident to group a number of units together who

would not normally make up a group. These groups are formed by the TSC

(contrast with User Defined Groups) sending a special message to units instructing

them to add a new group Ident to their list of groups. Up to 8 groups can be

defined. These temporary groups are lost at switch off unless 'Save Groups at

Switch Off' is enabled.

Economiser A process by which the Receiver is powered down whilst there is no received

signal. Periodically the receiver is powered up to check for such a signal. This is

used to extend the battery life of a Portable.

Enabled The 'True' state of a parameter. That indicates this parameter is active. Typically

this state is represented by a mark (either a tick or a cross) in a check box.

Compare with Disabled.

Encode Transmission of signalling. Either Selcall where selcall tone digits are encoded into

tone frequencies or CTCSS/DCS where tones modulated onto the channel's

carrier.

ETS European Technical Standard.

External Alert A facility for switching on various ancillary devices to meet customer's individual

requirements (e.g. car horn, flashing lamp etc.) when 'called'.

Only available on a mobile radio. To make available: go to Hardware Components,

Terminal Settings and set Product Type to a Mobile type.

Fallback A mode of operation that may be entered when the Network is suffering a

malfunction. During this mode certain facilities (e.g. PSTN) may not be available.

FFSK Fast Frequency Shift Keying. This is a signalling system for the transfer of digital

information. It works by using one of two audio tones to represent data being

transmitted.

Fleet A group of units formed such that only a shortened form of dialling (2 or 3 digits) is

required between them. These groups are normally assigned contiguous ident's.

FOACSU Full Off Air Call Set Up. A method of call set-up where the calling party has to

manually answer the incoming call before the trunking system will allocate a traffic

channel to the call. This reduces the loading on traffic channels as it prevents them

being allocated to calls when the called party is not present to deal with the call.

FPGA Field Programmable Gate Array.

FPP Field Personality Programmer.

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TNM-M-E-0001 Issue 3

Hash (#) digits These digits are used for two purposes:

• For Selcall identities (encode and decode) - known as User Id digits. These digits

are replaced by the user id entered at switch on (if enabled)

• Use in DTMF dialled strings - their use is network dependent to access special

services.

IDENT A 13 bit number used for Identification purposes. Associated with a Prefix (PFIX)

this forms a 20 bit address which is used for identification purposes in signalling

between the radio and the trunking system.

Identity Name given to a sequence of tones which is used in sequential tone signalling. See

Valid Selcall Digits.

Idle State The state of the radio when it is not in a call.

Inaccessible A state of a channel such that it is unavailable to the user through normal methods

of channel selection. Therefore inaccessible channels will not appear on the

channel menu.

Include Calls These type of calls are used to allow a 3rd party to join into an existing call.

Link Establishment A delay incorporated into the start of every selective call or DTMF transmission

Time which allows for the finite delay of the radio equipment in responding to any radio

signal. This includes both the commencement time of the originating transmitter

and the response time of the receiver.

Locked A state of a channel whereby it is not possible to change channels using the normal

up/down keys on the channel menu until the OK key is pressed. See Auto Channel

Selection Lock.

MEP Miniaturisation Extent Parameter. Used in systems that use ANN numbering.

Modifier Part of a dialled string that modifies the nature of the call made to a number (e.g.

dialling "*9" before the number that is to be dialled will modify the call to be an

emergency call).

MPT1327 A signalling standard for Trunked Private Land Mobile Radio Systems. Defined for

systems in the UK but also used outside the UK. Issued January 1988.

MPT1343 A System Interface Specification for commercial Trunking networks. Defined for

systems in the UK but also used outside the UK. Issued January 1988.

NDD Network Dependent Data. This is a field within the CCSC codeword that is used by

the trunking system to identify information about the trunking network and, in

particular, information specific to the site that is radiating the control channel. It is

used by the radio when it is acquiring a control channel to identify valid channels.

Null Id A selcall identity that is not defined and whose tones' field is displayed as a blank.

Open A state where transmit and receive are allowed. The channel is no longer open

when reset. Contrast with Closed.

Normally an Open channel would not have Selcall Mute and PTT Inhibit would be

disabled.

OPID Network Operator Identity used in Regional Systems. See Roaming.

PABX Private Automatic Branch Exchange.

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TNM-M-E-0001 Issue 3

Password An optional password system available on the radio. This feature is only available if

the radio does has a display and a keypad. To make available: go to Hardware

Components, Terminal Settings and set Product Type to one which has a display

and a keypad.

PFIX The 7 most significant bits of an MPT1327 address number. Normally same fleet

units have same prefix. Relates to individual and group address numbers.

PLL Phased Locked Loop.

PMR Private Mobile Radio (not normally trunked).

Priority Channel A channel in a search group that is scanned between every other channel.

PSD Peak System Deviation.

PSTN Public Switched Telephone Network

PTT Press To Talk. This is the term given to the operator’s key normally used to

commence transmitting a message.

PTT Inhibit A state whereby transmission using the PTT is not allowed. Also know as Tx

Lockout.

Queuing The storing of an Selcall Identity for later transmission.

If inhibited from transmitting a selcall sequence because the channel is busy then

the radio can queue the Send 1 / Send 2 sequence for later transmission. When a

radio unit is in Queuing mode all incoming calls are stored automatically in a queue

for later examination. The caller is given an indication that the call has been

queued by the called party. The queue will contain the identity of the caller and the

status value received (if a status call). Up to 20 calls may be queued. The Queuing

mode may be selected using the Modes Menu.

Note: Connecting a MAP27 device to a radio that is in queuing mode will disable

queuing. All incoming calls will then be routed both to the radio user interface and

to the MAP27 device connected to the radio. Also known as Logging Mode

Reference Frequency Normally this is generated from a high stability crystal oscillator reference and is

divided digitally in a frequency synthesiser for comparison with other frequency

sources, e.g. a VCO.

Registration Registration is a technique used to ensure that the trunking system knows the

location of radio units that are using the system. This allows the system to setup

calls quickly without having to search the whole system for the called radio.

Repeat Tone A selcall tone that is used to replace repeated tones. Fixed at tone E.

Example: An identity entered as '12333' would be sent by the radio as '123E3'.

Reset Resetting is caused by Three Tone Reset, a Remote Reset, an Individual reset or a

Group reset (Call Types in Decode Identity). When a radio is reset the effect on the

radio will be as follows:

• Any Call Alerts will be stopped

• The Call LED flashing will stop

• If the channel is in Open mode then the channel is closed

• The PTT is optionally inhibited see PTT Inhibit After Reset Sequence.

• In searching - if paused on a selcall channel then searching resumes

• If the Acknowledge property of a Decode Identity is set to 'Auto Interrogate' or

'Transpond & Auto Interrogate' then the Auto Interrogate encode identity is

transmitted.

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TNM-M-E-0001 Issue 3

Roaming This is a process that allows changing between regional trunking systems which

have different Operator Identities (OPID 's). Not allowed on MPT1343 Systems.

RSSI Received Signal Strength Indicator.

Scanning Process of switching between the channels in the nominated search group in cyclic

sequence, stopping when the search condition (which may be to look for either a

free or a busy channel) is satisfied.

SDM Short Data Message.

Search Group A group of channels that are either scanned for a signal above the search threshold

or are compared and voted for the strongest signal

Selcall Selective Calling - a system of signalling which allows 'dialling up' of specific

mobiles, portables and controllers. Such a system may be used to pass messages

as a data message to a specific user or group of users. It can be used to provide

remote switching facilities and to provide access control into community repeaters

or similar devices.

Selcall Mute A state of the audio gate whereby the loudspeaker is muted (closed).

Selcall System Sel

ective Calling, uses a tone sequence at the start, and end, of a call to control

which members of a fleet react to the transmission.

SFM Short Form Memory.

Sidetone Sidetone is the audio which can be (optionally) heard when Selcall, DTMF and

toneburst transmissions are made.

Simplex Mode of operation whereby the radio operates as a conventional fixed channel

radio outside the Trunking network.

Squelch System used to prevent weak, unintelligible signals and random noise from being

heard by a radio operator while still allowing intelligible signals to be received

normally. This is accomplished by the use of a threshold below which any received

signals are ignored. Only signals whose signal-to-noise ratio is above the squelch

level cause the audio circuits of the radio to be enabled, with the result that only

satisfactory signals are received. The squelch level is specified in SINAD.

Star (*) digits Digits known as Status or Message digits. These digits are used for three

purposes:

• Status Digits for Selcall Identities

• Wildcard digits in Status strings

• Use in DTMF dialled strings - their use is network dependent to access special

services.

Status A feature whereby a radio's status (or usually the status of the radio's user) can be

transmitted and a status message from other radios can be displayed. This

operates through status digits in selcall identities. Either in Encode Identities or

Decode Identities as follows:

Encode Identities: Status digits within the identity are used to transmit the current

situation of the radio's user (E.g. "Out To Lunch").

Decode Identities: Status digits are looked up in a table (Status Menu) for possible

messages to display.

SW Software.

SYS System Identity Code part of the CCSC.

TCXO Temperature Compensated Crystal Oscillator.

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TNM-M-E-0001 Issue 3

Temporary Temporary Registration; a process carried out by the Dispatcher due to some

system failure that prevents it from carrying out normal registration. The radios will

recognise this temporary registration mode but will otherwise use the network in the

same way as if they were registered. They may be required to re-register when

normal registration mode is resumed.

Three Tone Reset This is a system whereby a call to a user automatically reset all other users in a

group.

Example: a call to user '12345' would call 12345 and reset all other users on this

channel with an identity 123nn where n can be any digit 0-9, A-F.

Timed Reset Facility that causes the Radio, after a certain period of time, to restore current

channel to it's initial condition e.g. if it was previously searching it will resume

searching.

Time Shared A time-shared control channel is one which is used by more than one site. This

allows a wide coverage area to be obtained using only one frequency.

The forward channel from the TSC to the radio is divided into timeslots. Each site

using the channel is allocated one timeslot in which to transmit and send signalling.

Therefore, when on a timeshared channel. the radio may be able to receive bursts

of signalling from different sites at different signal strengths and may receive

periods when no signalling is received.

Depending on the type of system, the radio may be able to perform transactions

with any site it can receive from or only with a specific site.

TMR Trunked Mobile Radio.

Tone Burst An audio tone is transmitted at the start of transmission to inform a relay (repeater)

station to switch itself on to relay the transmission.

Transpond An Acknowledge identity sent as a response to an individual call.

TRAXYS Air Interface for the PTT Telecom Trunked Radio Network, used in the

Netherlands.

TSC Trunking Site Controller. Central control required for the Trunking System to

function. Controls base stations.

Tx Inhibit A facility which prevents the user from transmitting,(other than alarms), while the

channel is Busy.

UMP User Memory Plug. A special device which contains the customisation data for the

radio. If this is removed then this can cause the radio to behave in a number of

ways.

User Defined Groups These groups are set up by the user (contrast with Dynamic User Groups) when

the user desires to be included, temporarily, in an existing group. Up to 8 groups

may be defined (in addition to the Network group Idents defined by Network Group

Numbers). This feature is only available if User Defined Groups parameter is

enabled. These temporary groups are lost at switch off unless 'Save Groups at

Switch Off' is enabled.

User Identity This is a sequence of up to four digits entered by the user when the Radio is

switched on, if this option is programmed. These digits are then substituted into any

transmitted selcall identity which includes # digits.

VCO Voltage Controlled Oscillator.

Vote Method used to compare the signal strength on a current channel with another

specified channel and then to choose the channel having the stronger signal.

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TNM-M-E-0001 Issue 3

Voting Feature used during searching when there is more than one channel which

satisfies the required conditions. It involves examining all the channels which

satisfy the required conditions, and then selecting the channel with the highest

signal strength.

VOX Voice Operated Transmit.

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TNM-M-E-0001 Issue 3

Table of Contents

DECLARATION............................................................................................................................................III

COPYRIGHT ................................................................................................................................................III

ERRORS AND OMISSIONS........................................................................................................................III

DOCUMENT HISTORY............................................................................................................................... IV

LIST OF ASSOCIATED PUBLICATIONS .................................................................................................. IV

WARNINGS AND CAUTIONS ..................................................................................................................... V

GLOSSARY OF TERMS............................................................................................................................. VI

TABLE OF CONTENTS.............................................................................................................................XV

1. INTRODUCTION..............................................................................................................................1.1

1.1 G

ENERAL

......................................................................................................................................1.1

1.2 S

COPE

..........................................................................................................................................1.1

1.3 D

ESCRIPTION

................................................................................................................................1.1

1.4 P

RODUCT

V

ARIANTS

A

ND

F

ACILITIES

.............................................................................................1.2

1.5 S

OFTWARE

V

ERSIONS AND

N

AMING

...............................................................................................1.5

1.5.1 Filename Structure.................................................................................................................1.5

1.5.2 Application Code....................................................................................................................1.5

1.5.3 Software Type Code ..............................................................................................................1.5

1.5.4 Version Number.....................................................................................................................1.6

1.5.5 Exclusions..............................................................................................................................1.6

1.5.6 Displaying Software Versions.................................................................................................1.6

1.5.7 Automatic Version Upgrade Prompting..................................................................................1.7

1.5.8 Transceiver SW Description, Start-up and Backup-Software................................................1.8

1.5.9 Wailing Siren (Boot-up Software Corrupted)..........................................................................1.8

1.6 A

DJUSTMENT AND

A

LIGNMENT

.......................................................................................................1.9

1.7 T

ORQUE

S

ETTINGS

........................................................................................................................1.9

1.8 S

PECIFICATION

..............................................................................................................................1.9

1.8.1 General ..................................................................................................................................1.9

1.8.2 Transmitter...........................................................................................................................1.10

1.8.3 Receiver...............................................................................................................................1.11

1.8.4 Signalling..............................................................................................................................1.12

1.8.4.1 CTCSS..................................................................................................................1.12

1.8.4.2 FFSK.....................................................................................................................1.13

1.8.4.3 Selcall ...................................................................................................................1.13

1.8.4.4 DTMF....................................................................................................................1.15

1.8.4.5 DCS......................................................................................................................1.16

1.8.4.6 C4FM………………………………………………………………………………………1.2

1.8.5 Environmental......................................................................................................................1.17

2. SERVICE PHILOSOPHY.................................................................................................................2.1

2.1 S

ERVICE

C

ONCEPT

........................................................................................................................2.1

2.2 W

ARRANTY

...................................................................................................................................2.1

2.2.1 Service Within and Out Of Warranty......................................................................................2.1

2.2.2 Ancillary Items........................................................................................................................2.1

2.3 S

OFTWARE

P

OLICY

.......................................................................................................................2.1

3. TECHNICAL DESCRIPTION...........................................................................................................3.1

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TNM-M-E-0001 Issue 3

3.1 R

ECEIVER

.....................................................................................................................................3.1

3.1.1 Front End Filters and RF Amplifier.........................................................................................3.1

3.1.2 First Mixer and IF Section......................................................................................................3.1

3.1.3 Quadrature Demodulator.......................................................................................................3.1

3.1.4 Receiver Audio Processing....................................................................................................3.3

3.2 T

RANSMITTER

...............................................................................................................................3.4

3.2.1 Drivers and PA Stages...........................................................................................................3.4

3.2.2 Power Control ........................................................................................................................3.4

3.2.3 Antenna Changeover and Harmonic Filter.............................................................................3.4

3.2.4 Transmitter Audio Processing................................................................................................3.4

F

REQUENCY

S

YNTHESISER

.......................................................................................................................3.6

3.2.5 General ..................................................................................................................................3.6

3.2.6 PLL.........................................................................................................................................3.6

3.2.7 VCO .......................................................................................................................................3.6

3.2.8 Negative Bias Generator and Loop Filter...............................................................................3.6

3.2.9 Phase Modulator....................................................................................................................3.6

3.2.10 Reference Oscillator ..............................................................................................................3.7

3.3 C

ONTROL

.....................................................................................................................................3.9

3.3.1 DSP and FPGA......................................................................................................................3.9

3.3.2 DSP Clock Oscillator..............................................................................................................3.9

3.4 M

EMORY

......................................................................................................................................3.9

3.5 P

OWER

S

UPPLIES

.......................................................................................................................3.11

3.5.1 Power On Function ..............................................................................................................3.11

3.5.2 Power Supplies....................................................................................................................3.11

3.5.2.1 +8V Regulator U900.............................................................................................3.11

3.5.2.2 +5V Regulator U901.............................................................................................3.11

3.5.2.3 +3.3V Regulator U912..........................................................................................3.12

3.5.2.4 +2.5V Regulator U903 .........................................................................................3.11

3.5.2.5 Negative Power Supply U904E/F .........................................................................3.12

4. ALIGNMENT (LEVEL 3 SERVICE ONLY)......................................................................................4.1

4.1 T

EST

E

QUIPMENT

..........................................................................................................................4.1

4.2 T

EST

S

ET

-

UP

................................................................................................................................4.3

4.2.1 COMMS Set up......................................................................................................................4.4

4.2.2 Radio Preparation..................................................................................................................4.5

4.2.3 Alignment Procedure .............................................................................................................4.6

4.2.3.1 VCO DAC Alignment..............................................................................................4.6

4.2.3.2 TCXO (Radio Netting Adjustment).........................................................................4.7

4.2.3.3 RX Front End.............................................................Error! Bookmark not defined.

4.2.3.4 Mute Adjustment.....................................................................................................4.9

4.2.3.5 RSSI .....................................................................................................................4.10

4.2.3.6 TX Power..............................................................................................................4.11

4.2.3.7 Modulation............................................................................................................4.12

4.2.3.8 Programming........................................................................................................4.13

4.2.3.9 Customers Radio Configuration Data...................................................................4.13

5. REPLACEABLE PARTS..................................................................................................................5.1

5.1 C

OMMON

P

ARTS

...........................................................................................................................5.1

5.2 B

AND

-S

PECIFIC

P

ARTS

.................................................................................................................5.2

Page xvii

TNM-M-E-0001 Issue 3

APPENDICES

APPENDIX A ~ TRANSCEIVER CONNECTIONS

APPENDIX B ~ SRM9010 MICROPHONE

APPENDIX C ~ SRM9020 MICROPHONE

APPENDIX D ~ SRM9025 HANDSET

APPENDIX E ~ SRM9030 CONTROL HEAD

APPENDIX F ~ ANCILLARIES

Page xviii

TNM-M-E-0001 Issue 3

(Intentionally Blank)

Page 1.1

1 ~ INTRODUCTION

TNM-M-E-0001 Issue 3

1. INTRODUCTION

1.1 G

ENERAL

The SRM9000 series of FM mobile radio transceivers is designed for PMR and Trunked operation in VHF

and UHF radio systems.

The system is available in a number of functional variants. Each variant uses the standard SRM9000 mobile

transceiver, which is software configured for different control ancillaries. The software configuration together

with the type of controller (Basic or Enhanced microphone, Handset, or Alphanumeric Control Head)

determines the radio features for the different variants as follows.

PMR/Trunked

Basic Telemetry Transceiver No Display or Control Head. SRM9005

Low Range Version with Basic Fist Microphone. SRM9010

Mid Range Version with Enhanced Alphanumeric Fist Microphone. SRM9020

High-end Version with Alpha Display Handset. SRM9025

System Level Remote Control Head with Alpha capability and Handset / Fist

Microphone / Desk Microphone options.

SRM9030

1.2 S

COPE

This manual provides technical specifications, description and servicing details for the SRM9000 series of

mobile radio transceivers together with the related microphones and control heads.

Unless specifically stated otherwise, the text and illustrations refer to all versions in the series.

1.3 D

ESCRIPTION

The design concept utilises wide band analogue techniques for RF transmit and receive circuitry with digital

signal processing analog or digital modulation and demodulation. Electronic tuning is used throughout the

mobile to eliminate manual tuning and level adjustment.

A Digital Signal Processor (DSP) and a Field Programmable Gate Array (FPGA) are used with other

dedicated devices in the SRM9000 to perform the following functions under software control:

• Frequency Synthesis of all operating frequencies.

• Modulation and demodulation of 10/12.5/20/25kHz FM signals on a per channel basis.

• Modem functionality for specified data modulation schemes.

• Filtering, pre-emphasis, de-emphasis, limiting, compression, muting, CTCSS, Selcall or any other

frequency or level dependent signal modification.

• Serial communications with the Control Ancillaries and Alignment Tool.

• Tuning Control data for TX and RX.

The SRM9000 Transceiver comprises a rugged extruded aluminium sleeve, which houses a single printed

circuit board assembly and provides all heatsink requirements. The sleeve housing is closed at each end by

high-impact plastic end caps; all cable ports and mechanical interfaces are sealed against moisture and dust

ingress.

The PCB assembly comprises a single, multi-layer PCB containing all the RF and control circuitry. The PCB

seats on an extruded aluminium tray that slides into the outer aluminium sleeve where it is secured with

screws accessed from the outside of the case. Provision is made under the main PCB tray assembly for

additional hardware options.

There are two installation methods available for the SRM9000. The outer aluminium extrusion has side

flanges that allow the mobile to be bolted directly to any flat surface in the vehicle. A quick release cradle is

also available.

Page 1.2

TNM-M-E-0001 Issue 3

1 ~ INTRODUCTION

1.4 P

RODUCT

V

ARIANTS

A

ND

F

ACILITIES

Product variants and facilities are detailed in Table 1-1, Table 1-2 and Table 1-3.

Table 1-1 Common Features for All Variants

Feature: Model: 9005 9010 9020 9025 9030

Control None or Serial

or Parallel if

Option Board

Display

Microphone

Display

Microphone

Display

Handset

Control Unit

with

Microphone

Display

- 1 digit LED 6 char LCD 2x12 char LCD 8x14 char

graphic LCD

Adjustable Display

Illumination

- - Yes Yes Yes

Buttons and Keys

- Vol Up/Down

Select

1 Function

Vol Up/Down

4 Function

Scroll Up/Down

Vol Up/Down

6 Function

12 Keypad

Send/End

Menu + Scroll

6 Function

12 Keypad

Send/End

Menu + Scroll

Speaker

- Yes Yes Yes* Yes*

Frequency Bands

66-88MHz, 136-174MHz, 174-208MHz, 208-245MHz, 335-375MHz,

400-450MHz, 440-512MHz, 470-530MHz

Channel Spacing

10/12.5/20/25kHz

Menu driven

- - Yes Yes Yes

Customisable Menus

- - Yes Yes Yes

* Note: Handsets have a built-in earpiece therefore an external speaker is optional.

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